A rare cause of a parotid mass: spontaneous pseudoaneurysm of the superficial temporal artery

Longitudinal Colour Doppler sonogram of the mass. Large arrow (left) showing arterialised turbulent flow within the mass. Small arrows (bottom) showing external carotid artery just before distal bifurcation. P denotes parotid gland.

Coronal short tau inversion recovery (STIR) magnetic resonance image with arrow on serpiginous low signal void within the vessel within the mass, which is seen as mixed/high signal. P denotes parotid gland.

Oblique magnetic resonance angiographic image showing the external carotid artery (ECA), the superficial temporal artery (STA) with the arrow showing the abnormal flow within the aneurysm lumen.